CN1526349A - Electric cooker - Google Patents
Electric cooker Download PDFInfo
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- CN1526349A CN1526349A CNA2004100022312A CN200410002231A CN1526349A CN 1526349 A CN1526349 A CN 1526349A CN A2004100022312 A CNA2004100022312 A CN A2004100022312A CN 200410002231 A CN200410002231 A CN 200410002231A CN 1526349 A CN1526349 A CN 1526349A
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- loop wire
- electric cooker
- antimagnetic
- heater coil
- loop
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- 229910000859 α-Fe Inorganic materials 0.000 claims description 48
- 239000000758 substrate Substances 0.000 claims description 36
- 238000009434 installation Methods 0.000 claims description 26
- 230000002093 peripheral effect Effects 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 11
- 239000004020 conductor Substances 0.000 claims description 5
- 239000000696 magnetic material Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 235000007164 Oryza sativa Nutrition 0.000 abstract description 4
- 235000009566 rice Nutrition 0.000 abstract description 4
- 240000007594 Oryza sativa Species 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 29
- 230000004907 flux Effects 0.000 description 23
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- 238000002474 experimental method Methods 0.000 description 11
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- 238000004804 winding Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 241000209094 Oryza Species 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
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- 238000000576 coating method Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
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- 230000005611 electricity Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/12—Cooking devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Induction Heating Cooking Devices (AREA)
- Cookers (AREA)
- General Induction Heating (AREA)
Abstract
A rice cooker comprises a main body; a vessel accommodated in the main body in such a manner that the vessel is freely attachable/detachable; and a cover for covering the main body. The main body includes a protection frame for accommodating the vessel; a heater coil attached on the protection frame, and which induction-heats the vessel; and one or plural conductive loop wires arranged outside and/or beneath the heater coil.
Description
Technical field
The present invention relates to be used for the electric cooker of general family or professional usefulness.
Background technology
Utilize the electric cooker of electromagnetic induction heating to flood market in recent years.In the special fair 4-36009 communique of Japan Patent, disclosed the electric cooker of conventional example.Figure 13 is the pattern cutaway view of the electric cooker of conventional example.Among Figure 13, the 9001st, the body roughly cylindraceous of top opening is covered by the lid 9012 that opens and closes freely.9002 dismounting of interior pot are contained in the inside of body 9001 freely.In pot 9002 form by magnetics such as stainless steel, iron.Bearer bar 9003 is accommodation sections of interior pot 9002, is formed with the round-ended cylinder shape by nonmetallic materials.Be provided with the heater coil 9013 of pot 9002 in the eddy-current heating in the outside of bearer bar 9003.Heater coil 9013 is made of the interior loop 9005 in the outside, bottom surface that is arranged on bearer bar 9003 and the exterior loop 9004 that is arranged on its periphery.And, be provided with ferrite 9006 in the foreign side of heater coil 9013, carry out antimagnetic (reducing electric cooker) to the outside thus to outside leaked magnetic flux.The 9008th, the temperature sensor of pot 9002 temperature in measuring.The 9009th, to the control substrate of heater coil 9013 supply high frequency electric power.
The 9007th, the anti-magnetic sheet of conductive material system (such as aluminum).Anti-magnetic sheet 9007 is arranged on the periphery side of heater coil 9013.In anti-magnetic sheet 9007, produce the vortex flow of offsetting by the magnetic field of anti-magnetic sheet 9007.Anti-magnetic sheet 9007 reduces to the magnetic field of electric cooker external leaks (magnetic flux), thereby the temperature of member of outside that can prevent body 9001 or be positioned at body 9001 is because of rising to heater coil 9013 outside leaked magnetic flux.
But the electric cooker of conventional example carries out built-inly because of the anti-magnetic sheet of the aluminum cylindraceous that width is big, so body seems bigger with respect to the interior pot of electric cooker, exists and carries and the problem of setting property difference.Also exist the problem that weight increases and cost rises of using the anti-magnetic sheet of aluminum and making electric cooker.In addition, anti-magnetic sheet exists sometimes because of the configuration of substrate and the situation that can't dispose not of uniform size of body.The shape that need change anti-magnetic sheet according to the kind and the capacity of electric cooker, anti-magnetic sheet can't be general.
The present invention is used to address the above problem, and its purpose is to provide a kind of and can reduces effectively to the magnetic field of the external leaks of electric cooker (magnetic flux), small-sized light weight and cheap electric cooker.
Content of the present invention
In order to address the above problem, the present invention has following structure.The electric cooker of technical scheme 1 of the present invention comprises: body, dismounting are contained in described intrinsic container freely and open and close the lid cover described body freely, and described body has the bearer bar of holding said container, 1 or many conduction loop wires that are installed on the described bearer bar and described container is carried out the heater coil of eddy-current heating and is arranged on the outside and/or the below of described heater coil.
Loop wire is compared cheap light weight with the anti-magnetic sheet of the aluminum of conventional example, can be arranged in the small space.In the electric cooker of conventional example, the antimagnetic plate the earth of big solid shape has limited the basket shape of body.And the loop wire of fine softness to the free degree of the basket shape of body almost without limits.The magnetic field energy that electric current produced that flows in loop wire is offset near the magnetic field loop wire and the loop wire.Be arranged on 1 of suitable place or many loop wires have and the anti-roughly equal antimagnetic effect of magnetic sheet of aluminum of conventional example.Many loop wires preferably are set.
The present invention can reduce the magnetic field (magnetic flux) that electric cooker leaks towards the outside effectively, has the effect of the electric cooker that can realize small-sized light weight and cheapness.The electric cooker that the present invention can realize carrying easily and setting property is good.
The electric line that constitutes loop of going up of " loop wire " expression.Loop wire is wound into the loop wire of 1 circle or multiturn such as concentric circles or helically.Loop wire is the loop of one or more 1 circles preferably.But the line single line is twisted line also.But the line bare wire is covering thread also.
The expression that " is arranged on the loop wire in the outside of heater coil ": the vertical plane of heater coil is included in the vertical plane by determined of the periphery of loop wire (such as in the loop wire that the multiturn helically is reeled, with the line of the most peripheral face as periphery).
The expression that " is configured in the loop wire of the below of heater coil ": the lower end of the horizontal plane of loop wire (such as many loop wires be configured in differing heights occasion, be configured in the lower end of horizontal plane of the loop wire of lower side) lower than the lower end of the horizontal plane of heater coil.
1 loop wire also can be arranged on the outside and the below of heater coil.
In the electric cooker of another technical scheme of the present invention, described heater coil comprises the 1st heater coil that most peripheral partly is arranged on the position higher than interior circumferential portion, be arranged on to 1 described loop wire of major general near the most peripheral part of described the 1st heater coil, than on described most peripheral part more lateral and the high position, or be arranged near the interior circumferential portion of described the 1st heater coil, than on described interior circumferential portion inside and the low position.
The magnetic flux that the 1st heater coil is emitted towards the outside, be near the most peripheral of the 1st heater coil part, than near the interior circumferential portion of most peripheral part more lateral and high position and the 1st heater coil, be maximum than interior circumferential portion inside and low position.Here, by being set, loop wire can obtain good antimagnetic effect.The present invention can realize having the electric cooker of better antimagnetic effect.Preferably loop wire is separately positioned near the most peripheral part of the 1st heater coil, than on most peripheral part more lateral and the high position and near the interior circumferential portion of the 1st heater coil, than on interior circumferential portion inside and the low position.
In the electric cooker of a technical scheme more of the present invention, be arranged near the most peripheral part of described the 1st heater coil, than on described most peripheral part more lateral and the high position or be arranged near the interior circumferential portion of described the 1st heater coil, than the summation of the sectional area of the electric conductor of described interior circumferential portion inside and low locational described loop wire, bigger than the described loop wire that is arranged on other positions.
The sectional area of the electric conductor by increasing loop wire utilizes the loop wire big electric current that flows, thus the bigger repulsion magnetic field of generation.The present invention can realize having the electric cooker of better antimagnetic effect.
" summation of the sectional area of the electric conductor of loop wire is big " expression is thicker than the loop wire of other positions such as the diameter of loop wire.Also 11 ground of loop wire can be configured in other positions, many of the loop wires of same diameter are provided in a branch ofly near the most peripheral part of the 1st heater coil, than most peripheral part more lateral and high position.
In the electric cooker of another technical scheme of the present invention,, also be equipped with control substrate or operation substrate, be provided in the outside of described control substrate simultaneously to 1 described loop wire of major general to described heater coil supply high frequency electric power in the periphery side of described bearer bar.
By the arranged outside loop wire at the control substrate, loop wire is offset the magnetic flux that the electronic component (such as choking-winding) on the control substrate is produced, and reduces from electric cooker to outside leaked magnetic flux.The present invention can realize having the electric cooker of better antimagnetic effect.
In the electric cooker of another technical scheme of the present invention, the inboard in interior week at described heater coil, have the temperature sensor that the temperature to described container detects, will roughly set orthogonally to temperature sensor signal line and the described loop wire that the control substrate transmits from the output signal of described temperature sensor.
By making roughly quadrature of temperature sensor signal line and antimagnetic loop wire, can prevent that the magnetic field that antimagnetic loop wire produces from becoming noise and entering the temperature sensor signal line.The temperature sensor signal line transmits the signal of the few correct temperature sensor of noise.The present invention can reduce the magnetic field (magnetic flux) that electric cooker leaks towards the outside effectively, and can detect the temperature of container accurately, realizes the electric cooker that heater coil is controlled.
The electric cooker of another technical scheme of the present invention, the outside at described heater coil, the ferrite member that also has the magnetic material formation of one or more high magnetic permeabilities, this member is arranged to its length direction with respect to the length direction of the coiling of described heater coil quadrature roughly, is arranged on the downside of the vicinity, bottom of the upside of vicinity, upper end of described ferrite member or described ferrite member to 1 described loop wire of major general.
Around the few ferrite member of magnetic resistance, magnetic field (magnetic flux) is especially concentrated.The downside of the upside of the vicinity, upper end by loop wire being arranged on ferrite member or the vicinity, bottom of ferrite member, the big electric current that flows in loop wire, loop wire produce effectively and repel magnetic field.The present invention can realize having the electric cooker of better antimagnetic effect.Preferably loop wire is separately positioned on upside, and the downside of the vicinity, bottom of ferrite member of the vicinity, upper end of ferrite member.
The electric cooker of another technical scheme of the present invention, also have be fixed in described bearer bar or with the integrated loop wire installation component of described bearer bar, at least 1 described loop wire is clamped in the slot part that forms on the described loop wire installation component.
The present invention can realize having good antimagnetic effect, fixedly loop wire and making are easy to electric cooker easily with few operation.
" being clipped in the slot part " the expression loop wire is pressed from both sides at least and can not fallen down from slot part because of deadweight.Even loop wire further is bonded on the loop wire installation component by binding agent,, just belong to technical scope of the present invention as long as loop wire is pressed from both sides at least and can not fall down from slot part because of deadweight.Even use the occasion of binding agent,, just can obtain the easy effect of operation in the bonding operation of factory as long as loop wire is pressed from both sides at least and can not fall down from slot part because of deadweight.
The number of loop wire installation component can be arbitrarily.The periphery that is typically at bearer bar is equipped with a plurality of loop wire installation components.
The electric cooker of another technical scheme of the present invention, described bearer bar are one-body molded with 1 described loop wire at least.
The present invention has good antimagnetic effect, can realize cancellation or reduce significantly the fixing operation of loop wire, manufacturing process is few and make and be easy to electric cooker.
Also can pass through major part, form loop wire with bare wire with the resin coating bezel ring, line of bearer bar.
The electric cooker of another technical scheme of the present invention also is provided with and holds described ferrite member and have slot part, be fixed in the ferrite platform of described bearer bar, and at least 1 described loop wire is clamped in the slot part of described ferrite platform.
Among the present invention, the ferrite platform can be used for the fixing of fixing of ferrite member and loop wire.The present invention can realize not increasing the part number, have good antimagnetic effect and cheap electric cooker.
The electric cooker of another technical scheme of the present invention also has part or all the 2nd bearer bar that holds described bearer bar, and described the 2nd bearer bar is one-body molded with 1 described loop wire at least.
The electric cooker that the present invention can realize not increasing the part number, assembling is easy and have good antimagnetic effect.
In the electric cooker of another technical scheme of the present invention, described loop wire coats by having stable on heating cover layer.
Use as loop wire by the covering thread (such as ジ ユ Application Off ロ Application line (registration mark)) that will have the hear resistance covering, can provide reliability high electric cooker.
The electric cooker of another technical scheme of the present invention, also has the burn out detection portion that the broken string to described loop wire detects, when described burn out detection portion detects described loop wire broken string, stop heater coil or reduce its output, and/or demonstrate the situation of described loop wire broken string.
The present invention can realize the electric cooker of the safety that reliability is high.
In the electric cooker of another technical scheme of the present invention, described burn out detection portion detects the broken string of described loop wire according to the variation that the operating frequency of converter takes place.
In case loop wire broken string then changes with the load that resonant frequency drives the converter of heater coil, the operating frequency of converter (resonant frequency) changes.Detect by variation,, also can detect the broken string of loop wire even do not use special line-breakage sensor to operating frequency.The present invention can realize reliability height, safe and cheap electric cooker.
The electric cooker of another technical scheme of the present invention also has the spool of rolled power line, and described spool is arranged on the outside of described loop wire.
Electrical equipment must be restrained below the level of regulation by the noise of power line output.Structure of the present invention can be restrained the noise of electric cooker by power line output.
The content that novel characteristics of the present invention is exactly in claims to be put down in writing, by accompanying drawing and following detailed description, believing to have better understanding and evaluation to structure of the present invention, content and other purposes, feature.
The simple declaration of figure
Fig. 1 is the pattern cutaway view of the electric cooker of expression embodiments of the invention 1.
Fig. 2 is the pattern the inside figure of the electric cooker of expression embodiments of the invention 1.
Fig. 3 is the partial sectional view of the electric cooker of expression embodiments of the invention 1.
Fig. 4 is the stereogram of major part of the electric cooker of expression embodiments of the invention 1.
Fig. 5 is the figure of burn out detection portion structure of the electric cooker of expression embodiments of the invention 1.
Fig. 6 is the pattern partial sectional view that becomes the electric cooker that uses in the experiment of basis of the present invention.
Fig. 7 is the pattern the inside figure of the electric cooker of expression embodiments of the invention 2.
Fig. 8 is the partial sectional view of the electric cooker of expression embodiments of the invention 3.
Fig. 9 is the partial sectional view of the electric cooker of expression embodiments of the invention 4.
Figure 10 is the partial sectional view of the electric cooker of expression embodiments of the invention 5.
Figure 11 is the hold concurrently stereogram of antimagnetic loop wire installation component of the ferrite platform of electric cooker of expression embodiments of the invention 6.
Figure 12 is the pattern cutaway view of the electric cooker of expression embodiments of the invention 7.
Here note that the local of accompanying drawing or all be being illustrated as purpose, be described, might not verily reflect the relative size and the position of the reality of represented element with the performance of summary.
The specific embodiment
Followingly most preferred embodiment of the present invention is described with reference to accompanying drawing.
Embodiment 1
Utilize the electric cooker of Fig. 1～Fig. 6 and table 1 pair embodiments of the invention 1 to describe.
Fig. 1 and Fig. 2 are the pattern cutaway view and the inside figure of the electric cooker of embodiments of the invention 1.The 101st, the body roughly cylindraceous of top opening is covered by the lid 112 that opens and closes freely.The inside of body 101 accommodate dismounting container freely promptly in pot (container) 102.In pot 102 form by magnetics such as stainless steel, iron.Body 101 has the spool 111 and the power line 116 of bearer bar 103, ferrite 106, antimagnetic loop wire 107, temperature sensor 108, control substrate 109, radiator 110, heater coil 113, Thermal Cutoffs 114, temperature sensor signal line 115, commercial power line.
The foreign side of heater coil 113 disposes 6 ferrites 106 radially, and this ferrite 106 is with respect to the roughly configuration orthogonally of winding length direction of heater coil 113.Ferrite 106 is formed by the magnetic material of high magnetic permeability.Ferrite 106 prevents magnetic field that heater coil 113 the causes external leaks to body 101, promotes the internally eddy-current heating of pot 102 simultaneously.For interior loop 104 compare with exterior loop 105 the epidermis area little and make the height of body 101 lower etc. reason, only 3 ferrites cover exterior loop 104.
The 108th, the temperature sensor that the temperature of internal pot 102 detects.The 114th, Thermal Cutoffs.Temperature sensor 108 and Thermal Cutoffs 114 are configured in the inboard in interior week of interior loop 105.The lead-in wire that connects temperature sensor 108, Thermal Cutoffs 114 and control substrate 109 promptly, temperature sensor signal line 115 (comprising temperature sensor signal line and Thermal Cutoffs holding wire that each output signal with temperature sensor 108 and Thermal Cutoffs 114 transmits to control substrate 109), be configured to and antimagnetic loop wire 107 quadrature roughly.111 and 116 is spool and the power leads that hold commercial power line.For fear of the noise that heater coil 113 causes, the spool 111 of power line and power lead 116 are arranged on the outside of antimagnetic loop wire 107.Power lead 116 connects power line and control substrate 109.Control substrate 109 is with the output of source power supply, temperature sensor 108 and Thermal Cutoffs 114, and from the input signal of operation substrate (not shown), supplies with to heater coil 113 RF power that alternating magnetic fields are used takes place.The input of operation substrate is from the input signal of the guidance panel (not shown) that is provided in the body outside.Control substrate 109 also can be used for the operation substrate.The 110th, radiator carries on control substrate 109, and the switch element (semiconductor) that control is flowed to the electric current of heater coil 113 cools off.
The 107th, antimagnetic loop wire.In examples of implementation, 6 antimagnetic loop wires 107 are adapted to concentric circles.The closed loop that each antimagnetic loop wire 107 is 1 circles.Among Fig. 1,, 2 antimagnetic loop wires have only been represented for the ease of seeing drawing clearly.Fig. 3 is partial sectional view electric cooker, that comprise antimagnetic loop wire installation component 130 of expression embodiments of the invention 1.Fig. 4 be expression embodiments of the invention 1 electric cooker want portion's stereogram.
6 antimagnetic loop wires 107 are kept by 3 antimagnetic loop wire installation components 130 that set with the angle shape of 120 degree roughly mutually, are separately fixed at the outside and the below of heater coil 113.On antimagnetic loop wire installation component 130, offer the antimagnetic loop wire hole 131 of 11 antimagnetic loop wire 107 usefulness of ground break-through.Antimagnetic loop wire installation component 130 is fastened on the flange 120 of bearer bar 103 by screw 121.Antimagnetic loop wire 107 passes between control substrate 109 and the ferrite 106.
Also 6 slot parts can be set on antimagnetic loop wire installation component 130, each antimagnetic loop wire 107 be sandwiched slot part respectively keep.
1 antimagnetic loop wire 107 be configured near the most peripheral part of exterior loop 104, than on most peripheral part more lateral and the high position.Also can further other 1 antimagnetic loop wire 107 be configured near the interior circumferential portion of exterior loop 104, than on interior circumferential portion inside and the low position.
The bottom assemble method of the electric cooker of embodiments of the invention 1 is as follows.Bearer bar 103 is buried underground and moulding by heater coil 113 is exposed to peripherally.Set ferrite 106 then.The antimagnetic loop wire installation component 130 usefulness screws 121 that pass antimagnetic loop wire 107 are installed on the bearer bar 103.At last temperature sensor 108, Thermal Cutoffs 114 and heater coil 113 are connected with control substrate 109.By temperature sensor signal line 115 being adapted to and antimagnetic loop wire 107 quadrature roughly, can alleviating from antimagnetic loop wire 107 and enter noise in the temperature sensor signal that temperature sensor signal line 115 transmitted.
The electric cooker of embodiment 1 carries out following action.The user puts into pot 102 with gratin (Mi Heshui), is positioned in the bearer bar 103.Behind the closing cap 112, the guidance panel (not shown) that is connected with the operation substrate is operated, electric cooker begins action.109 actions of control substrate, flowing in heater coil 113 is used to produce the electric current of alternating magnetic field.In heater coil 113, produce alternating magnetic field, in interior pot 102 mobile vortex flows.The joule Hot that vortex flow causes is to interior pot 102 eddy-current heating, thereby gratin is heated the cooking.Put at the microcomputer (effect of performance control part) of control on the substrate 109, store in advance with temperature sensor 108 detected in the temperature of pot 102 and cooking time as the cooking mode of parameter.Microcomputer carries out ON/OFF control according to this cooking mode to switch element, with the power supply of control to heater coil 113.
Fig. 5 is the figure of burn out detection portion structure of the electric cooker of expression embodiments of the invention 1.Burn out detection portion puts on control substrate 109.Control substrate 109 has translation circuit (comprising: rectifier bridge 504, choking-winding 505, smoothing capacity 507, current detecting part 506, heater coil 513, resonant capacitance 508, switch element 510, frequency detecting portion 501, control part 509) and broken string display part 502.Control part 509 double as burn out detection portions.
Rectifier bridge 504, choking-winding 505 and smoothing capacity 507 input source power supplies are AC power, output dc voltage.The high frequency that choking-winding 505 prevents converter output from power line to external leaks.509 pairs of switch elements of control part 510 carry out ON/OFF control.Heater coil 513 and resonant capacitance 508 form resonance circuit.Under the driving of switch element 510, the electric current of the resonant frequency that flows in heater coil 513 and the resonant capacitance 508.
Current detecting part 506 (current sensor) detects the electric current that flows in the heater coil 513.The frequency of 501 pairs of electric currents that flow in heater coil 513 of frequency detecting portion detects.As long as 1 broken string, then the load of the resonance circuit that is made of heater coil 513 and resonant capacitance 508 changes in the antimagnetic loop wire 507, and resonant frequency also just changes.Control part 509 detect resonant frequency the variation of ormal weight arranged after (such as, do not put into pot 102 and just translation circuit is carried out the occasion of ON or the occasion of antimagnetic loop wire 507 broken strings, the displacement of resonant frequency differs widely, control part 509 can be discerned the reason of fault), be judged as antimagnetic loop wire 507 and broken.Control part 509 stops the energising to heater coil 113, makes the LED (light emitting diode: flicker Light Emitting Diode) of broken string display part 502 simultaneously.The occasion of antimagnetic loop wire 507 broken strings, control part 509 also can reduce the output power to heater coil 113.
For clear and definite effect of the present invention, below experimental data is made an explanation.To the variation of the position of exterior loop and antimagnetic loop wire relation and along with the variation of the radical of antimagnetic loop wire causes, the variation of the antimagnetic effect of antimagnetic loop wire is investigated.Fig. 6 is the pattern partial sectional view that becomes the electric cooker that uses in the experiment of basis of the present invention.Exterior loop 604 and interior loop 605 are installed on the bearer bar 603, ferrite 606 is provided in its outside.On antimagnetic loop wire installation component 640, offer 10 antimagnetic loop wire holes 621～630, it is provided in the outside of ferrite 606.Identical with embodiments of the invention 1, antimagnetic loop wire is passed through between control substrate and exterior loop.Outwards coil electricity detects from the magnetic flux density maximum of rice cooker body at a distance of 10cm.Table 1 expression measurement result.The defined value of ratio (%) of the magnetic flux density when " anti-magnetic efficiency " is the magnetic flux density that reduces when antimagnetic loop wire is arranged with respect to no antimagnetic loop wire.The value of anti-magnetic efficiency is big more, and expression reduces towards the magnetic field that leak in the outside of exterior loop 604.
| The experiment number | Antimagnetic loop wire radical | The position of antimagnetic loop wire | Magnetic flux density (μ T) | Anti-magnetic efficiency (%) |
| ??1 | 0 (nothing) | - | ???11.00 | ???- |
| ??2 | ???10 | 621～630 | ???3.31 | ???70 |
| ??3 | ???5 | 621，623，625，627， 629 | ???4.94 | ???55 |
| ??4 | ???8 | 621，622，623，624， 626，627，629，630 | ???3.34 | ???70 |
| ??5 | ???6 | 622，623，625，626， 629，630 | ???4.73 | ???57 |
| ??6 | ???6 | 621，622，625，626， 629，639 | ???4.76 | ???57 |
| ??7 | ???6 | 621，622，623，625， 626，629 | ???4.60 | ???58 |
Do not have the occasion (experiment number 1) of antimagnetic loop wire, magnetic flux density is 11.00 μ T.With 10 antimagnetic loop wires till top to the bottom of exterior loop lower end 604b of exterior loop upper end 604a, be provided in the occasion (experiment number 2) of the periphery of exterior loop 604, magnetic flux density has reduced 70%, is 3.31 μ T.In addition, 5 antimagnetic loop wires equally spaced are disposed at the occasion (experiment number 3) in identical zone, also can obtain antimagnetic effect, but to compare its effect poor slightly with experiment numbers 2.As seen antimagnetic loop wire has effective antimagnetic effect, and more little its effect in the interval of antimagnetic loop wire is big more.
In the experiment numbers 4, in 10 antimagnetic loop wires that in experiment number 1, use, removed the antimagnetic loop wire that passes antimagnetic loop wire hole 625 and antimagnetic loop wire hole 628.Its result obtains and tests the antimagnetic effect of 1 same degree.That is, its antimagnetic effect of antimagnetic loop wire near exterior loop upper end 604a and exterior loop lower end 604b is good more.
In the experiment numbers 5～7, in antimagnetic loop wire hole 625 and antimagnetic loop wire hole 626, pass antimagnetic loop wire, 4 antimagnetic loop wires are passed near the antimagnetic loop wire hole exterior loop upper end 604a and the exterior loop lower end 604b, the difference of the antimagnetic effect that the difference configuration of antimagnetic loop wire is produced is investigated again.Anti-magnetic efficiency in each experiment is 57～58%, does not find valuable difference.Like this, known by antimagnetic loop wire is arranged near the exterior loop upper end 604a (most peripheral part), than near most peripheral part more lateral and high position and the exterior loop lower end 604b (interior circumferential portion), than on interior circumferential portion inside and the low position, can obtain good antimagnetic effect.
Although data do not show, have known that big more, the antimagnetic effect of sectional area of antimagnetic loop wire is good more.
The electric cooker of embodiments of the invention 1 utilizes the antimagnetic loop wire of wire to carry out antimagnetic to the magnetic field of leaking from exterior loop.Thus, reduce effectively, realized small-sized, light weight and cheap electric cooker to the magnetic field of electric cooker external leaks (magnetic flux).The present invention has realized the easy and good electric cooker of setting property of carrying.
Among the embodiment 1, in the upper and lower settings of radiator 110 antimagnetic loop wire (with reference to Fig. 1), also all antimagnetic loop wires can be wrapped in the upside or the downside of radiator 110.
The circuit structure of burn out detection portion is not limited to structure shown in Figure 4.
The sectional area of antimagnetic loop wire is big more, and antimagnetic effect is good more.The sectional area of antimagnetic loop wire is preferably 3.5 square millimeters.Be arranged near the most peripheral part of heater coil, than on most peripheral part more lateral and the high position or near the interior circumferential portion of heater coil, than the sectional area of interior circumferential portion inside and low locational antimagnetic loop wire, be preferably made bigger than the sectional area of other antimagnetic loop wires.The diameter that is configured in these locational antimagnetic loop wires is made thicker than the diameter that is arranged on other locational antimagnetic loop wires.Again, many antimagnetic loop wires of configuration on these positions, configuration 1 antimagnetic loop wire (diameter of antimagnetic loop wire is identical) on other positions.
Antimagnetic for the magnetic field that produces from interior loop 105 is carried out, also can below the bearer bar bottom, antimagnetic loop wire be set.Lid inside has the occasion of the electric cooker of heating plate and heater coil, also can between lid and heating plate antimagnetic loop wire be set.
The periphery side of the heater coil in the container in antimagnetic loop wire also can be arranged on and be installed in beyond the pot 102.To being installed in the water receptacle eddy-current heating in the electric cooker, in cooking process, use high-temperature vapor when the electric cooker that brushes on the rice surface, if be installed in the periphery side of water receptacle external heated coil antimagnetic loop wire is set, then can obtain antimagnetic effect.
Embodiment 2
Utilize Fig. 7 that the electric cooker of embodiments of the invention 2 is described.Fig. 7 is the pattern the inside figure of the electric cooker of expression embodiments of the invention 2.The electric cooker of embodiment 2 only is that the allocation position of antimagnetic loop wire is different with the electric cooker of embodiment 1.Other structures are identical with embodiment 1, the Therefore, omited explanation.
Among the embodiment 2, in the periphery side of exterior loop 104 and the outside of control substrate 109,6 antimagnetic loop wires 707 are set.Among Fig. 2, understandable in order to make figure, only represented 2 antimagnetic loop wires 707.The assemble method of the electric cooker bottom of embodiment 2 is undertaken by following.
With the peaked measured value of rice cooker body at a distance of the magnetic flux density at 10cm place, the occasion of not having antimagnetic loop wire is 11 μ T.Antimagnetic loop wire is arranged on occasion of controlling between substrate 109 and the exterior loop and the occasion of controlling the outside of substrate 109, and measured value is respectively 5.5 μ T and 4.8 μ T.That is,, can carry out antimagnetic to the magnetic field that produces from exterior loop effectively by antimagnetic loop wire being arranged on the outside of control substrate.
Embodiment 3
Utilize Fig. 8 that the electric cooker of embodiments of the invention 3 is described.Fig. 8 is the partial sectional view of the electric cooker of expression embodiments of the invention 3.The electric cooker of embodiment 3 only is that the allocation position of antimagnetic loop wire is different with the electric cooker of embodiment 1.Other structures are identical with embodiment 1, the Therefore, omited explanation.
Embodiment 4
Utilize Fig. 9 that the electric cooker of embodiments of the invention 4 is described.Fig. 9 is the partial sectional view of the electric cooker of expression embodiments of the invention 4.Embodiment 4 only is that the fixing means of antimagnetic loop wire is different with embodiment 1.Other aspects are identical with embodiment 1.Fixing means to the antimagnetic loop wire of embodiment 4 describes below.
Below bearer bar 903, bury heater coil 113 (exterior loop 104 and interior loop 105) underground.Foreign side at heater coil 113 is provided with a plurality of radial reinforcements 909.Each one of ferrite 106 and heater coil 113 has even compartment of terrain and is embedded on the reinforcement 909.And, be provided with 6 antimagnetic loop wire holes 908 in the foreign side of the ferrite 106 of reinforcement 909.In each antimagnetic loop wire hole 908, respectively set 1 antimagnetic loop wire 907.Structure beyond the structure of bearer bar 903, ferrite 106 and antimagnetic loop wire 907 is identical with embodiment 1, the Therefore, omited explanation.
Because antimagnetic loop wire is provided in the antimagnetic loop wire hole that is provided with on, the reinforcement integrated with bearer bar, so no longer need the loop wire installation component.Do not need the loop wire installation component is fixed in operation on the bearer bar yet.
And, under the state that antimagnetic loop wire is fixed on the bearer bar,, can almost save the installation work-hour of antimagnetic loop wire by bearer bar is one-body molded.In addition, also can heater coil, ferrite and antimagnetic loop wire and bearer bar is one-body molded.
And, also can antimagnetic loop wire hole be set on the ferritic reinforcement not burying underground, set antimagnetic loop wire.Antimagnetic for the magnetic field that produces from interior loop 105 is carried out, also can below the bearer bar bottom, reinforcement be set, bury antimagnetic loop wire underground.
Embodiment 5
Utilize Figure 10 that the electric cooker of embodiments of the invention 5 is described.Figure 10 is the partial sectional view of the electric cooker of expression embodiments of the invention 5.Embodiment 5 only is that the fixing means of antimagnetic loop wire is different with embodiment 1.In other respects, embodiment 5 is identical with embodiment 1.Fixing means to the antimagnetic loop wire of embodiment 5 describes below.
With heater coil 113 (exterior loop 104 and interior loop 105), the outside is embedded in the below of bearer bar 1003 with almost exposing.Foreign side at heater coil 113 is provided with a plurality of radial reinforcements 1009.Each one of ferrite 106 and heater coil 113 has even compartment of terrain and is embedded on the reinforcement 1009.And, be provided with 5 antimagnetic loop wire mounting groove portions 1008 in the foreign side of the ferrite 106 of reinforcement 1009.11 ground is clamped in antimagnetic loop wire 1007 in the antimagnetic loop wire mounting groove portion 1008.Structure beyond the structure of bearer bar 1003, ferrite 106 and antimagnetic loop wire 1007 is identical with embodiment 1, the Therefore, omited explanation.
Because antimagnetic loop wire is embedded in the antimagnetic loop wire mounting groove portion that is provided with on, the reinforcement integrated with bearer bar, can reduce the installation work-hour of antimagnetic loop wire.In addition, also antimagnetic loop wire can be bonded on the reinforcement with binding agent.
And, also can antimagnetic loop wire mounting groove portion be set on the ferritic reinforcement not burying underground, set antimagnetic loop wire.
Embodiment 6
Utilize Figure 11 that the electric cooker of embodiments of the invention 6 is described.Figure 11 is the hold concurrently stereogram of antimagnetic loop wire installation component of the ferrite platform of electric cooker of expression embodiments of the invention 6.Embodiment 6 only is that the fixing means of antimagnetic loop wire is different with embodiment 1.In other respects, embodiment 6 is identical with embodiment 1.Fixing means to the antimagnetic loop wire of embodiment 6 describes below.
The ferrite platform antimagnetic loop wire installation component 1101 of holding concurrently is relative with exterior loop 104, and pass the foreign side that screw installation portion 1102 is fastened on bearer bar 102 with screw.Ferrite is embedded in the ferrite platform and holds concurrently in the antimagnetic loop wire installation component 1101, is carved with the C shape groove with diameter slightly littler than the diameter of antimagnetic loop wire 1107 coaxially with heater coil 113.In antimagnetic loop wire 1107 embedded grooves 1107.Structure in addition is identical with embodiment 1, in this description will be omitted.
Antimagnetic loop wire embedded be arranged on the ferrite platform and hold concurrently in the groove on the antimagnetic loop wire installation component, so do not need the antimagnetic loop wire installation component of special use.Can guarantee antimagnetic loop wire with respect to ferritic positional precision, provide reliability high electric cooker.
Embodiment 7
Utilize Figure 12 that the electric cooker of embodiments of the invention 7 is described.Figure 12 is the pattern cutaway view of the electric cooker of expression embodiments of the invention 7.Embodiment 7 only is that the fixing means of antimagnetic loop wire is different with embodiment 1.Among Figure 12, interior pot 1203, bearer bar 1 1201, exterior loop 1204 and interior loop 1205 are corresponding with interior pot 102, bearer bar 103, exterior loop 104 and interior loop 105 among the embodiment 1 (with reference to Fig. 1), the Therefore, omited explanation.The electric cooker of embodiment 7 also has bearer bar 2 1202.
In bearer bar 2 1202, accommodate bearer bar 1 1201.Bearer bar 2 1202 is formed from a resin, and side is carved with and is used for groove that antimagnetic loop wire 1207 and exterior loop 1204 and interior loop 1205 are relatively set within it.The outside of antimagnetic loop wire 1207 is embedded in the groove with exposing.Bearer bar 2 1202 also can be one-body molded with antimagnetic loop wire 1207.
The electric cooker of embodiment 7 has bearer bar 2, thereby does not have the electric cooker of embodiment 1～6 light.But, even the electric cooker of embodiment 7 also can obtain the antimagnetic effect identical with embodiment 1.
Among above-mentioned all embodiment, a plurality of antimagnetic loop wires are set with one heart circularly, but also can relatively set with 1 antimagnetic loop wire helically, with heater coil.In this occasion, the wire connecting portion of antimagnetic loop wire is 1 place, compares with the occasion of using many antimagnetic loop wires, can reduce the manufacturing process of electric cooker, realizes cheap more electric cooker.
The present invention since carry out at the container that is used for magnetic is made eddy-current heating heater coil the outside and/or below set 1 or many antimagnetic loop wires, therefore can obtain good antimagnetic effect.
The present invention reduces the magnetic field (magnetic flux) that electric cooker leaks towards the outside effectively, can obtain and can realize miniaturization, light weight and the cheap so favourable effect of electric cooker.The present invention can obtain and can realize carrying easily and the good so favourable effect of electric cooker of setting property.
Most preferred embodiment of the present invention has been carried out comparatively detailed explanation, but the content that this most preferred embodiment disclosed, can change, in invention scope of being applied for and aim, can realize the combination of each key element and the variation of order at the thin of structure.
Claims (14)
1. an electric cooker is characterized in that, comprising: body, dismounting are contained in described intrinsic container freely and open and close the lid that covers described body freely,
Described body has: the bearer bar of holding said container, 1 or many electric conductivity loop wires being installed on the described bearer bar and described container is carried out the heater coil of eddy-current heating and is arranged on the outside and/or the below of described heater coil.
2. electric cooker as claimed in claim 1 is characterized in that,
Described heater coil comprises the 1st heater coil that most peripheral partly is arranged on the position higher than interior circumferential portion,
To 1 described loop wire of major general, be arranged near the most peripheral part of described the 1st heater coil, than on described most peripheral part more lateral and the high position or be arranged near the interior circumferential portion of described the 1st heater coil, than on described interior circumferential portion inside and the low position.
3. electric cooker as claimed in claim 2, it is characterized in that, be arranged near the most peripheral part of described the 1st heater coil, than on described most peripheral part more lateral and the high position or be arranged near the interior circumferential portion of described the 1st heater coil, than the summation of the sectional area of the electric conductor of described interior circumferential portion inside and low locational described loop wire, bigger than the described loop wire that is arranged on other positions.
4. electric cooker as claimed in claim 1; it is characterized in that; also be equipped with control substrate or operation substrate in the periphery side of described bearer bar, be provided in the outside of described control substrate simultaneously to 1 described loop wire of major general to described heater coil supply high frequency electric power.
5. electric cooker as claimed in claim 1, it is characterized in that, described body has the temperature sensor that the temperature to described container detects in the inboard in the interior week of described heater coil, and is adapted to roughly quadrature of the temperature sensor signal line that will transmit to the control substrate from the output signal of described temperature sensor and described loop wire.
6. electric cooker as claimed in claim 1 is characterized in that,
Also have the ferrite member that the magnetic material of one or more high magnetic permeabilities forms in the outside of described heater coil, this member is arranged to its length direction with respect to the length direction of the coiling of described heater coil quadrature roughly,
Be arranged on the downside of the vicinity, bottom of the upside of vicinity, upper end of described ferrite member or described ferrite member to 1 described loop wire of major general.
7. electric cooker as claimed in claim 1 is characterized in that, also have be fixed in described bearer bar or with the integrated loop wire installation component of described bearer bar, at least 1 described loop wire is clamped in the slot part that forms on the described loop wire installation component.
8. electric cooker as claimed in claim 1 is characterized in that, described bearer bar is one-body molded with 1 described loop wire at least.
9. electric cooker as claimed in claim 6 is characterized in that, also is provided with and can holds described ferrite] have slot part and be fixed in ferrite platform on the described bearer bar, at least 1 described loop wire is clamped in the slot part of described ferrite platform.
10. electric cooker as claimed in claim 1 is characterized in that, also has part or all the 2nd bearer bar that holds described bearer bar, and described the 2nd bearer bar is one-body molded with 1 described loop wire at least.
11. electric cooker as claimed in claim 1 is characterized in that, described loop wire coats by having stable on heating cover layer.
12. electric cooker as claimed in claim 1, it is characterized in that also having the burn out detection portion that the broken string to described loop wire detects, when described burn out detection portion detects described loop wire broken string, stop heater coil or reduce its output, and/or demonstrate the situation of described loop wire broken string.
13. electric cooker as claimed in claim 12 is characterized in that, the variation that described burn out detection portion takes place according to the operating frequency of converter detects the broken string of described loop wire.
14. electric cooker as claimed in claim 1 is characterized in that, also has the spool of rolled power line, described spool is arranged on the outside of described loop wire.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003062272A JP3996533B2 (en) | 2003-03-07 | 2003-03-07 | rice cooker |
| JP2003062272 | 2003-03-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1526349A true CN1526349A (en) | 2004-09-08 |
| CN1248632C CN1248632C (en) | 2006-04-05 |
Family
ID=33124248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100022312A Expired - Lifetime CN1248632C (en) | 2003-03-07 | 2004-01-14 | Electric cooker |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3996533B2 (en) |
| KR (1) | KR100947940B1 (en) |
| CN (1) | CN1248632C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102697375A (en) * | 2011-07-26 | 2012-10-03 | 九阳股份有限公司 | Electro-magnetic induction heating rice cooker |
| CN104095517A (en) * | 2013-04-02 | 2014-10-15 | 松下电器产业株式会社 | Rice Cooker |
| CN104248332A (en) * | 2013-06-27 | 2014-12-31 | 美的集团股份有限公司 | Stew pan |
| CN108497908A (en) * | 2017-02-24 | 2018-09-07 | 佛山市顺德区美的电热电器制造有限公司 | Cooking apparatus |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4963274B2 (en) * | 2007-07-17 | 2012-06-27 | 象印マホービン株式会社 | Induction heating cooker |
| CN101969704A (en) * | 2010-09-28 | 2011-02-09 | 苏州市春和电器有限公司 | Wire coil of electromagnetic oven |
| JP2013102593A (en) | 2011-11-08 | 2013-05-23 | Sony Corp | Magnetic coupling unit and magnetic coupling system |
| KR101671901B1 (en) * | 2015-04-10 | 2016-11-02 | 쿠쿠전자주식회사 | inductive heating apparatus for cooking |
| JP6599280B2 (en) * | 2016-05-06 | 2019-10-30 | 象印マホービン株式会社 | Cooker |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0810136A (en) * | 1994-07-01 | 1996-01-16 | Mitsubishi Electric Corp | Rice-cooker |
| JPH08266401A (en) * | 1995-03-31 | 1996-10-15 | Matsushita Electric Ind Co Ltd | Induction heating rice cooker |
| KR19980063772U (en) * | 1997-04-21 | 1998-11-25 | 구자홍 | Heating part structure of electric induction heating rice cooker |
| JPH1156604A (en) * | 1997-08-21 | 1999-03-02 | Matsushita Electric Ind Co Ltd | Rice cooker |
| KR200273006Y1 (en) * | 1999-04-15 | 2002-04-20 | 구자홍 | Shielding structure of magnetic force line in induction oven |
-
2003
- 2003-03-07 JP JP2003062272A patent/JP3996533B2/en not_active Expired - Fee Related
-
2004
- 2004-01-07 KR KR1020040000850A patent/KR100947940B1/en not_active IP Right Cessation
- 2004-01-14 CN CNB2004100022312A patent/CN1248632C/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102697375A (en) * | 2011-07-26 | 2012-10-03 | 九阳股份有限公司 | Electro-magnetic induction heating rice cooker |
| CN102697375B (en) * | 2011-07-26 | 2015-10-21 | 九阳股份有限公司 | electromagnetic induction heating rice cooker |
| CN104095517A (en) * | 2013-04-02 | 2014-10-15 | 松下电器产业株式会社 | Rice Cooker |
| CN104248332A (en) * | 2013-06-27 | 2014-12-31 | 美的集团股份有限公司 | Stew pan |
| CN108497908A (en) * | 2017-02-24 | 2018-09-07 | 佛山市顺德区美的电热电器制造有限公司 | Cooking apparatus |
| CN108497908B (en) * | 2017-02-24 | 2023-11-21 | 佛山市顺德区美的电热电器制造有限公司 | Cooking utensil |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20040080335A (en) | 2004-09-18 |
| CN1248632C (en) | 2006-04-05 |
| KR100947940B1 (en) | 2010-03-15 |
| JP2004267466A (en) | 2004-09-30 |
| JP3996533B2 (en) | 2007-10-24 |
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